Dynamic response of strongly correlated Fermi gases in the quantum virial expansion

doi:https://doi.org/10.1103/PHYSREVA.81.033630

Title: Dynamic response of strongly correlated Fermi gases in the quantum virial expansion

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Abstract

By developing a quantum virial expansion theory, we quantitatively calculate the dynamic density response function of a trapped strongly interacting Fermi gas at high temperatures near unitarity. A clear transition from atomic to molecular responses is identified in the spectra when crossing from the BCS to BEC regimes, in qualitative agreement with recent Bragg spectroscopy observations. Our virial expansion method provides a promising way to solve the challenging strong-coupling problems and is applicable to other dynamical properties of strongly correlated Fermi gases.

Authors:

Hui, Hu ^[1]; Xiaji, Liu; Drummond, Peter D ^[1]

ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122 (Australia)

Publication Date:: 2010-03-15

OSTI Identifier:: 21408485

Resource Type:: Journal Article

Journal Name:: Physical Review. A

Additional Journal Information:: Journal Volume: 81; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.81.033630; (c) 2010 The American Physical Society; Journal ID: ISSN 1050-2947

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; DENSITY; FERMI GAS; RESPONSE FUNCTIONS; SPECTRA; SPECTROSCOPY; STRONG-COUPLING MODEL; TRAPPING; UNITARITY; FUNCTIONS; MATHEMATICAL MODELS; PARTICLE MODELS; PHYSICAL PROPERTIES

Citation Formats


                    Hui, Hu, Department of Physics, Renmin University of China, Beijing 100872, Xiaji, Liu, and Drummond, Peter D. Dynamic response of strongly correlated Fermi gases in the quantum virial expansion.  United States: N. p., 2010. 
        Web.  doi:10.1103/PHYSREVA.81.033630.

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                    Hui, Hu, Department of Physics, Renmin University of China, Beijing 100872, Xiaji, Liu, & Drummond, Peter D. Dynamic response of strongly correlated Fermi gases in the quantum virial expansion.  United States.  https://doi.org/10.1103/PHYSREVA.81.033630

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                    Hui, Hu, Department of Physics, Renmin University of China, Beijing 100872, Xiaji, Liu, and Drummond, Peter D. Mon .  
        "Dynamic response of strongly correlated Fermi gases in the quantum virial expansion".  United States.  https://doi.org/10.1103/PHYSREVA.81.033630.

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@article{osti_21408485,

  title        = {Dynamic response of strongly correlated Fermi gases in the quantum virial expansion},

  author       = {Hui, Hu and Department of Physics, Renmin University of China, Beijing 100872 and Xiaji, Liu and Drummond, Peter D},

  abstractNote = {By developing a quantum virial expansion theory, we quantitatively calculate the dynamic density response function of a trapped strongly interacting Fermi gas at high temperatures near unitarity. A clear transition from atomic to molecular responses is identified in the spectra when crossing from the BCS to BEC regimes, in qualitative agreement with recent Bragg spectroscopy observations. Our virial expansion method provides a promising way to solve the challenging strong-coupling problems and is applicable to other dynamical properties of strongly correlated Fermi gases.},

  doi          = {10.1103/PHYSREVA.81.033630},

  url          = {https://www.osti.gov/biblio/21408485},
  journal      = {Physical Review. A},

  issn         = {1050-2947},

  number       = 3,

  volume       = 81,

  place        = {United States},

  year         = {2010},

  month        = {3}

}

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